The National Hurricane Center has designated this area of low pressure 680 miles east - southeast of Bermuda a sub-tropical system with maximum sustained winds of 50 mph.

Subtropical Storm Melissa is a "hybrid" system with characteristics of both a warm-cored tropical system, and a mid-latitude low pressure area driven by fronts and temperature differences.

The frontal boundaries near the center appeared to have dissipated according to the latest NHC analysis. And even though there are signs of some sort of outflow indicative of a tropical system, Melissa is still embedded in large upper low making it a subtropical system as opposed to a fully tropical system.

Subtropical Storm Melissa could still become fully tropical as it moves northwest at about 9 mph, but will only have on a couple of days to do so before conditions become unfavorable for that type of development.

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